A Jackson Memorial Hospital radiologist was strangled to death in her Parkland home on Christmas Eve by an electronic massager that became ensnared with a necklace she was wearing, according to the Broward Sheriff's Office.

Michelle Ferrari-Gegerson, 37, had spent the evening wrapping gifts and preparing to go to work, and had used the massager to relieve neck pain, said a report released Wednesday by BSO.

Ferrari-Gegerson was discovered unconscious on her bedroom floor by...